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[Official] NVIDIA GTX 780 Owner's Club - Page 1790

post #17891 of 24915
iirc throttling or the gpu not needing full boost is the only reason u wont get max clocks,have you looked to make sure you havent hit the limits or are you just you assuming since you set them they havent been reached?
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post #17892 of 24915


Current settings for cooler temps.
post #17893 of 24915
Is Asic quality a given fact about overclock?
A friend got a Gigabyte Ghz 780 with 66.7% Asic Hynix chips tha does stable with default bios,1257/7200 1.200 Volt flat.No boosting whatsoever clean runs 3d mark,valley.
post #17894 of 24915
Quote:
Originally Posted by HellionGR View Post

Is Asic quality a given fact about overclock?
A friend got a Gigabyte Ghz 780 with 66.7% Asic Hynix chips tha does stable with default bios,1257/7200 1.200 Volt flat.No boosting whatsoever clean runs 3d mark,valley.

I think you answered your own question.
That said there are varying schools of thought....I subscribe to the one where it is all or mostly puffery.
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post #17895 of 24915
Quote:
Originally Posted by Trissaayne View Post

iirc throttling or the gpu not needing full boost is the only reason u wont get max clocks,have you looked to make sure you havent hit the limits or are you just you assuming since you set them they havent been reached?

I checked just now in BF4 and I'm nowhere close to any limits, and it's an annoying issue because I need all the power I can get for 120Hz and can't have my card dropping in speed for no real reason. GPU usage fluctuates a good bit though, so that's probably it.
post #17896 of 24915
Quote:
Originally Posted by HellionGR View Post

Is Asic quality a given fact about overclock?
A friend got a Gigabyte Ghz 780 with 66.7% Asic Hynix chips tha does stable with default bios,1257/7200 1.200 Volt flat.No boosting whatsoever clean runs 3d mark,valley.

More so guidelines. Higher quality asic does use less voltage at stock settings than lower quality.
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post #17897 of 24915
Quote:
Originally Posted by Jack Mac View Post

It tops out 72C.
Instructions not clear, GPU is now covered in peanut butter.

EZ3FLASH VBIOS TOOL

OCCAMRAZOR EZ3FLASH guide thumb.gif

Quote:
Originally Posted by HellionGR View Post

Is Asic quality a given fact about overclock?
A friend got a Gigabyte Ghz 780 with 66.7% Asic Hynix chips tha does stable with default bios,1257/7200 1.200 Volt flat.No boosting whatsoever clean runs 3d mark,valley.


ASIC correlation with OC is not written in stone; Here is a quote from one of my articles:

"ASIC score is more an indication for nvidia and amd and for us only a measure of leakage in our chips (thanks to W1zzard from TechPowerup we can see the value in GPUz), its good to know the ASIC if youre going to run SLI because it want to have closely similar ASIC score on your cards because they will have similar voltages and you can clock/volt them together without having to go separate settings if you get big difference ASIC ( i.e: 60% - 80%)
@TSMC for nvidia and FAB1 for AMD, as the chips are removed from the waffer, tested and fused with the voltage is reflected on the leakage of every chip!

Originally Posted by Dave Baumann Product manager AMD
"Actually, it does the opposite! We scale the voltage based on leakage, so the higher leakage parts use lower voltage and the lower leakage parts use a higher voltage - what this is does narrow the entire TDP range of the product. Everything is qualified at worst case anyway; all the TDP calcs and the fan settings are completed on the worst case for the product range"

A high leakage card operates at lower voltage to balance the otherwise higher power draw and temps. It will also overclock higher than what a low leakage card would. The problem is though, cards usually have a limit of voltage increase, i.e. say +150mV , which means AB could overvolt a 1.15V card to 1.3V, but a 1.1V card would crash above 1.25V.

A high leakage card is what you want if you do extreme OC, and you can keep the card cool (H20,LN2 etc.). Your mileage will vary of course, not all low VID cards are good OC cards, and not all high VID cards OC bad. It's a part of product binning, they try to fit in as many chips as possible to a similar ASIC spec.

From "the man" himself W1zzard - Techpowerup:

"it's from the gpu silicon, and it's used to calculate the gpu voltage.

"bad" gpus get a higher voltage so they make the default clock. "good" gpus can do it with lower voltage

as you've seen in this thread, the scale for nvidia isnt perfect yet, so i'll apply some fixes once I have more data that suggests the typical ranges of gpu leakages"




Cheers

Ed

(Team skyn3t)

Edited by OccamRazor - 2/28/14 at 6:56am
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post #17898 of 24915
Quote:
Originally Posted by OccamRazor View Post

EZ3FLASH VBIOS TOOL

OCCAMRAZOR EZ3FLASH guide thumb.gif
Thanks, can't wait to try this when I get home, rep.
post #17899 of 24915
1. Is it possible to undervolt the Asus DCII 780 more than -62mV? The slider in AB goes to -100mV but anything after -62mV is ignored.
2. Is it possible to lock p-state 5 to a lower voltage than 0.912V or unlock the clocks in this state to something higher than 954mhz?
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post #17900 of 24915
Just installed my 780 DC2, WOOW. HUGE buff from my 580.. Silent, Highest temp ~61c. It idles at 30c, Im beyond happy!

BF4 ultra all max, 120hz - ~80+ fps..
Edited by Slayem - 2/28/14 at 5:22pm
    
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